Set of 4 Outdoor 17" DINING BISTRO Chair Seat Cushion - Sunbrella (Pacific Blue #5401) with Zipper Set of 4 Seat Cushions - Pacific Blue (Sunbrella #5401) with Zipper Approximately 17" (wide) x 17.5" (deep) x 3" (thick) each cushion Shell Fabric : Sunbrella Fabric resists stains, mold, mildew and fading. Color stays strong and vibrant w/ UV and all weathers protection. 100% Solution Dyed Acrylic. Fill Material : 70% Polyester Fibers + 30% Urethane Foam - packed as pillow insert Reversible, Tied to secure, Cover w/ zipper. Poly/Form filled pillow Insert can be remove from cover for cleaning purpose.